Non-Billable / Non-Specific Code
ICD-10-CM G31 is the diagnosis code for Other degenerative diseases of nervous system, not elsewhere classified. This code falls under the section "Other degenerative diseases of the nervous system" within Chapter 6 â Diseases of the nervous system (G00-G99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in G31. If the patient has both, code each condition separately:
Understanding where G31 sits in the ICD-10-CM classification helps ensure proper coding:
No, G31 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
G31 is the ICD-10-CM diagnosis code for "Other degenerative diseases of nervous system, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
G31 is located in Section G30-G32 â "Other degenerative diseases of the nervous system" within Chapter 6 of the ICD-10-CM Tabular List.
G31 has 5 sub-code(s) that provide more specific detail: G31.0, G31.1, G31.2, G31.8, G31.9.
Use G31 when the patients documented diagnosis matches "Other degenerative diseases of nervous system, not elsewhere classified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other degenerative diseases of nervous system, not elsewhere classified is G31.
No, G31 is non-billable. Use a more specific sub-code for primary diagnosis billing.
G31 is in Chapter 6 of the ICD-10-CM Tabular List.
Yes, G31 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.